I really need to lose some weight . I should go on a diet .   I think you should work out more too .   Wow ! You are much skinnier since the last time I saw you .   I have lost about five kilos .   How did you do it ?   I was on a diet and exercised daily .   I hate working out .   You can try a low-impact workout schedule . Why don't you go to a gym ?   Good idea . Then the trainer will help me to make a fitness plan . Besides that , what's your secret ?   The secret is persistence . 